Wheelhead and the like



Oct. 2o, 1931. w. LE R. BRYANT `1,827,968

WHEELHEAD AND THE LIKE Filed Nov, 9' 1925 3 Sheets-Sheet l Nm@ Y Oct. 20, 1931. W- E R BRYANT 1,827,968

WHEELHEAD AND THE LIKE Filed Nov. 9, 1925 3 Sheets-Sheet 2 Oct. 20, 1931.

W. LE R. BRYANT 'WHEELHEAD AND THE LIKE Filed Nov. 9, 1925 5 Sheets-Sheet 5 APatented Oct. 20, 17931.

. the rollerl journal portions in their bearinglsfis v v ings have been e have been. of smaller "diameter than;thev spin dle,l so theirppropery speed ha's'beetloo high to, be actually reached for` the Y desiredl speed WILLIAM ROY namanti,

'nnenAsEn L Y.

or srninerinnn; iv'nrnvronrgnnnnonn is.v nnynn'ner .f srRINerrnLnynnivrenr,,Anivirmsmnnrmx,or sAInwr-,LLIAMLE Roy nvnnr, l

` zwiiriurinnnn AND1 TELIK- f L This invention-relatesto bearings h igli speed shaftssuoh as wheelheads for grinding machines and the like.) n I i Practically allhigh speed wlieelheadsheretofore made have employed ball bearings Vof standard vdesign, selec`ting thel mostiy perfeot individual bearings'. forthis service." rl'lven such bearin-gsrarefound to be comparatively short lvedg'lwhen run at speeds. desired when' .ent invention, therefore, roller bearings arel `'substituted for1 ballQbearing/s', the rollers being j'our'nlaledfon portions of small diameter compared with those portions contacting with the rotating Spindldand the portions lcontacting," with the spindle being vpreferably of By this construetionthe p'eripheralspeedbof much lesstliany :the peripheral speed ofthe spindle, and 'i the.. friction ,Coetlioient' for Vthe small diameter bearings is also lessthan for large diameter bearings. XVhe'rfe beari used asheretfore, the balls of thespindle. Y 1t 1121s therefore,lbeen possible?- ywith suoli .a eonstruction-in many cases to reach the Adesired spindle speed.` v

- ln. the present construction the spindle is H the mostrapidlyfrotatingelement,l so that it may be runata much higher speed: than v heretofore.,v lleains may be provided by which f end thrust upon the spindle may be taken up, and means for adjustingforwearboth radikallyfand axially-of tlieg'spindle;

,f For a more complete` understanding of this vthe wheelhead,j

`invention reference may be liadtotheiaceorn pa-nying drawlngsin whlcbff Figure 1 is.alongitudinal-section'through showingi av pair" of z spaced bearingsv for the spindle. l

' Figures--f2l and 3" are perspeotiveviewsaof 'parts ofthe-bearingirolleroage.

,an adjnstable bearing'roller support. VFigures 7 and 8 are fragmentary sections lili'gure 9 is face of member shown in perspective in Figure 3'- 'i Referring vis shownaframeportionffor supporting the fsliaft'orspindle 2, this4 shaft or 4:spindle beiiigijournaledin bearingsffandf, fittedin oppesite endsuof ai'transverse opening 6,

tion S'fitting within 'the boren. rlhe eas- "ingsQ-re held in position inv thevfbore 6Y vin"l any suitable manner,` but as herein. shown tioned a Cage 25 e carrying the bearing rollers arranged Circular,array about thej-spin die, aswill: later appear. Eafclfof these ca'ges uis formed in two parts"v as 30 and" 3l?, show-n 'detached iny Figures -2 and 3 respectively. The memberllvoomprises afdisl portionBQ havin-g: angjintegral extensionA 33- on one face. Thisextension 1s out away as, 34y and Brto form Achambers'to reeeive a vpair 'of bearing*` rollers as 365,5y Asft-hesev lfea-ringfrollers` are Vprefverably' somewhatv different in4k the two bearings lfand t'heconstru'e'tfi'on for bearing 4 willi-first bedesoribecl. s shown best inYA Figure 1, each-"0f the rollers has aoen-I tral-l portion V37- of relatively large diameter, and: end'portionsBS ofrellatively' small di` ametger. O'n'eef these; end portions' 38isjourfnaled VinA aV perforationl 39 in 'the Cage mem- 'ber' `'311, andthe oth'en end portionjournale'dlina matingfperforationa@ 'in thezmem- 'ber 30. Both.. the oagemembers f 30'y and: 31

have Centrall aperfora'tions"l 411* and: 42ithnough i l which-passes the j'ournaled portion 43Y ofthe 5s kon lines4 7.147 and Sly-8, respeotively', of 'Eigi an elevationshowing the outerv Y L. "GQ first to Figures I, 7 and 8, at l1 f (l5 through the frainemeniberfl. of the `bearings t and '5i comprises a two-part oas- Y ing, one'of-these parts 7 having a hubperspindle 2.V vAs shown, this journal portion is provided withv oppositely disposed ta-` pered bearingfaces44. and 45 on which complementa-Hy tapered portions 46 and 47 of eachof the rollers 36 bears. A third roller 50, constructedsimilarly to eaeh'of the rollers 36, is mounted in such a manner pas toI press the bearing faces 44 and 45 againstthe corresponding faces 46 and-47 -of the rollers 36.11'1 orde-rito provide for wear of j the bearing faces, this third roller 50 is shown as mounted for adjustment toward and from the rollers 36 and is disposed in such angular relation to these rollers about the axis `of the spindle 2 as to provide ayproper bearing lforthis spindle. As" shown, thisthird 'rolleris spring pressed' toward-the pair of rollers 36, thus to provide automatically Vfor the `taking up of wear. For, this end the roller 50Nis journaledin a twofpartv frame member 55, part-sV of this form memberfbeving shown detached at 56 and 57 of Figures 5 and-'6. `Member 57 comprises a plate having spaced block portions 58 and 50 projecting vfrom oneface thereof. The member 56 comprises a plate60 somewhat similar to thelplate portion of part 57 andthe two 1 parts are' assembled together as by meansof pins-or bolts 61A and '62 passing through or into, making perforations 63 and 64 inthe '.iarts56 and 57. The vblock portions 58and Y, 59 form end walls of a socket in which'the large diameter portion ofthe roller l rides, the journal portions 65 and 66 of this roller being journaled in bearing.:openingsf67randV l68 inthe parts 56 and 57. Thepart 56 has projecting on itsouter face eccentrically `disposed relatively to the opening 67, a circular boss V70,fand the part 57 hasa similar and "31. It isevident-that Aby rotation ofV 1 thehframe about the axis ofthe bosses 70 and j, 71,V the roller journaled in the journal openings 67 and 68, will be .moved bodily since `boss V71 projecting fromits outer face. The i bosses 7 0,V and 71 are concentric lwithV each p. other when the frame parts. are assembled. AThese bosses 7 0 andv 71, when the Nparts are assembled, are j ournaled in circular openings 72and 73 respectively pf the cage parts 30 `these journal openings are eccentric posed with relation tothe bosses.

' This frame carrying'the roller 50 is urged r in a directionv to press the-roller50 against.

the spindle V,journal faces by means ofa spring 75 shown best inI-Figure 4. ThisV j spring has an end portion 76 looped about the j. pin orfbolt 62. Its intermediate portion bridges andl pressespnflattened edge ,faces- 76 andy77of the parts 56 and 57 and its,op

vposite end'V bears-against the end of an ad.` justingV screw,78, extending .through -the .outer wall 21 ofthe casingf7. Alock nut180 is shown. as threaded on theouter, end of this' l: adjusting screwin orderto `fix it in adjusting position. By adjusting this screw, the tenigsaaee Y 'sion of the spring'7 5 which acts to press the bearing roller 50 against the spindle may be adjusted. l

The cage is xed against rotation Within the casing, and for this purposel the ni'embers 30 and 31 are shown as provided with alined perforations and 86 through which extend screws 87 between'the rollers 36 and- A50, theser screws also extendingthrough per: `forations 881m the casingnut platel 20. 1 AThese ,perforation's are preferably counterbored to receive theheads 89 of the screws 87.

V In order to facilitate assembly, the parts 30a`ndl`31" are -shown'la's provided with axially alined perforations 90 and 91 respectively, in whichdowel pins- 92 an`dj93 (see Figure 4) may be-placed. These pins act to retain'the part 3,0 inproper relation to thel part 31, enclosingthe rollers 36 and the adjusting frame ,j carrying'the j roller 50 in position, so that the casing cover 20'may7be placed overlthe spindle and thescrews 87 'then' inserted.

, In order to provide for'end thrust of the spindle and to vtake up wearin this direction,

it is preferable to insert shinis, Vas shown at "'90 95, Vbetween the `cover 2,0 and the other pori tion of the casing, the roller bearing 'portions ,38 `and 65 and 6,6 Vbeing all` of the same .length andl extending through their 4bearing perfo- 'l rations and; engaging at their yinner ends against the inner endwall A96 of the casing,

andat their outerends-through perforations in theV shimi on.the'coverplate-QO.` Due to the ,tapered bearing faces 44an'd 45 of the spindle` and mating tapered `faces 46 and 47 of the rollers 36 and the corresponding faces .ofIg the` roller50, endwise movement of the rspindle l2 with relation'to'the'lrollers is prevented, and by prevented axially Ymovement of therollers themselves, en'dwise movement of the shaftjisprevented. Sincel the rollers lare prevented from endwise movement by lj" "Means are also provided, for lubricating the variousbearings. For this purpose the wall 21'jo'f the casing is shown as provided with a plugged opening 99 leading to an oil edge of the ca singand communic'atingwith an opening 101`fdrilled inwardly,"radially adjacent `to the inner wall `of the casing: This opening 101 leads into. an annularpassage 102 between the inner wall of the casing and; theadjacent faceof the member 31. This passage 100 extending inwardly froml outer annularpassage extends` around a boss103 Y forming concentric'allyV with theshaft opening 42 on'the .inner facefof the cage element 31. As shown best'inFigure 9,v grooves'104'f extend from this annular passage through to the inner journals 38 of therollers 36 and Imay also pass downwardly to the lowerportion of the casing where it may comer in contact with the bearing portions of the roller 50. The outer endV of the passage 101 may be closed off as by means -of a plug 105.Vv vSimi- `larly the Vcagevpart 30 is formed with a concentric circular boss 110 through which are formed the oil grooves 111 through which oil may reach thek outer journals of the rollers 36, and may find its way to the other end portion of the casing at lits lower end where-1".

l p [prisinga cage,.a pair of rollers having small frame carrying the roller 50. Rings ofrfelt,k

it may have access to the outer end of the or other suitable material as at 112 and113 bear lon the periphery of the bearing Vpori faces 126 which engagea mating lcylindrical tion of the spindle, thus to prevent the lio-w of oil along the surface of the bearing porY tion lengthwise ofthe spindle.

As in the particular construction illustrated, the spindle isy designed to carry one or more grinding wheels, such as that shown at 115, it is preferable to `place a guard 116 to prevent access of abradent particles to the interior of the bearing. As shown, this guard comprises a disk khaving annular ribs 117 and annular portions on'the outer face of the plate 20, so as to provide a tortuous passage to the shaft bearing portions. As' shown in Figure 8 the plate 116 is pressed againstoneend of the spindle by means of a shoulder 121 carried by a spindle section `arranged inaxial alinement with the spindle andy 122 having its inner end threaded and engaging a mating threaded opening inthe spindle 2, the spindle section being of smaller diameter than the end of the spindle adjacent thereto and the plate 116 being carried on this portion of the spindle section.

The bearing 5 maybe constructed similarly to thevbearing 4, except that it is usually un' necessary 'to provide for the taking up 'of axial thrust of the spindle in this bearing.V For this reason the bearing rollers shown at 125 are pro-vided with cylindrical bearing portion 127 onthe spindle. lThe guard 116 lfor this bearing is shown as held in position a sleeve 130 which may serve as a driving held on the spindle 2 by means ofthe pulley nut 131 threaded on its end.

Preferably the large diameter portions of.

the various bearing rollers are of larger diameter` th an the mating portions of the spindle,

as'shown' these portions being substantially. double the diameter of the spindle. Thus the rate of rotation of the bearing rollers is less than that of the spindle; in theembodiment shown being lonly one half;V and since the journal diameters of the rollers are veryfmuch smaller than `ltheir' bearing, diameters, theperipheral speed of the bearing portions is spindle itself. It is evident thatvvery` much' higher speedmay be given to the spindle if other parts arenot required to rotate at a higher velocity than the spindle.

An embodiment of the invention having'l thus been described, it should be evident to thosel skilledV in the art that various changes and modifications might be made without dey partingfrom the spirit or'scope of the inven tion as defined by the appended claims.

Itclaim; y 1.,A delviceiof theclass described, comdiameter portionsjournaled in said cage, a member carried by said cage and adjustablev toward and from the journals of said pair of vrollers ,a roller having small diameter porf A.tions journaled in said member, each of said rollers having a large diameter portion, and

a shaft extending between said rollersV and bearingon the large diameter portions there- 20A deviceV of the class described, comprisingLa cage, a pair of rollers having small diameterportions journaled in said cage, a

member carriedl by said cage and adjustable toward andfrom the ljournals of said .pair

Aof roll'ers,aroller having-small diameterportions journaled in said member, each of said ,toward said shaft to take up wear. Y

3. A device-of the class described,'compris. ing a stationary cage, a pair of rollers having rollers having a large diameter portion, and meansrfor resiliently pressing said memberY portions of small diameter journaled in saidV cage, a member rockably supported by said y cage, a third roller havinga portion of small diameter journaled in said member eccentrically to the pivot of said member, said rollers Vhaving portions of large diameters, a shaft extending between said rollers and bearing n on their large diameter portions, and a spring 1 acting to turn said-member about its pivot in a direction to swing its roller toward said shaft.

Y 4. A device of the class described, comprising a, casing, a two-part cage fixed within said casing, a pair of rollers having portions ofsmall diameter j ournaled in both parts of said cage, a .member pivoted between said cage parts, a roller having portions of small diameter journaled in said member, a shaft ,extending through said casing and'cage andl journaled-on the vportions of large diameter of said rollers, a leaf spring having one end Vbearing on said .member tending to rock said member to press its roller toward said shaft, j

and means accessible fromv without said`casing'for adjustingrthe pressure exerted by said spring.

In testimony whereof I. have affixed my signature. l i l WILLIAM LE ROY BRYANT. 

